Thermal transfer receiver, method for producing the same, method for recording image, and recorded image

Inactive Publication Date: 2006-03-02
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008] Accordingly, the objects of the present invention are to provide a thermal transfer receiver adapted to form transferred images excellent in solvent resistance and superior in wear resistance; the method for producing the thermal transfer receiver; the method for recording an image and a recorded image that utilize the thermal transfer receiver.
[0009] The thermal transfer receiver according to the present invention comprises a support and a receiving layer disposed on the support, wherein the receiving layer comprises a polyethyleneimine derivative, a thermoplastic resin, and a crosslinker. Consequently, the image transferred on the thermal transfer receiver has excellent resistance against solvents such as MEK as well as superior wear resistance.
[0011] In the method for recording an image according to the present invention, an image is transferred thermally by making contact an ink layer of a thermal transfer medium and a receiving layer of a thermal transfer receiver each other, heating the thermal transfer medium, thereby causing thermal transfer from the ink layer to the receiving layer, wherein the thermal transfer receiver comprises a support, a peeling layer comprising a wax disposed on the support, and the ink layer comprising a colorant and a salt of ethylene-methacrylic acid copolymers. Consequently, images can be recorded on the receiving media with excellent resistance to solvents such as MEK and superior wear resistance.

Problems solved by technology

However, the solvent resistance is insufficient in these proposals with respect to images formed on the receiving layer and the coating layer.
However, these proposals suffer from insufficient solvent resistance of the images for sever applications.
However, these proposals suffer from the insufficient strength of the receiving layer, in particular the lower solvent resistance of images on the receiving layer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example a-1

(1) Production of Thermal Transfer Medium

[0078] Polyethylene terephthalate film of having a thickness of 4.5 μm was prepared for the support. The support was coated with silicone rubber SD7226 (by Toray Dow Corning Silicone Co.), on the surface opposite to which a thermal transfer recording layer being disposed, in an amount of 0.35 g / m2 and was dried to prepare a support having a heat-resistant smooth layer.

[0079]—Formulation of Peeling Layer—

Carnauba wax dispersion in toluene (solid content: 10%)90 partsEthylene-vinyl acetate copolymer resins in toluene1*)10 parts

1*)solid content: 10%, MFR: 15 dg / min, vinyl acetate: 28%,

[0080] The liquid for peeling layer of the formulation described above was coated over the side of the thermal transfer recording layer on the support to a thickness of 1.0 μm, and was dried to form a peeling layer.

[0081]—Formulation of Ink Layer—

Salt of ethylene-methacrylic acid copolymer1*)62 partsAqueous dispersions of carbon black (solid content: 38%)22 pa...

example a-2

[0085] The thermal transfer receiver was produced in the same way as Example A-1, except that the receiving layer was disposed on the sandblasted surface of the polyester film having a thickness of 50 μm and a smoothness of 250 seconds. The surface of the receiving layer had a smoothness of 450 seconds in accordance with JIS P8119. The same thermal transfer medium was used as that in Example A-1.

example a-3

[0086]—Formulation of Receiving Layer—

Salt of ethylene-methacrylic acid copolymer1*)19 partsAliphatic epoxy compound (solid content: 100%)2*) 1 part Polyethyleneimine Epomin P-10003*)15 partsWater65 parts

1*)Chemiparl S-650, by Mitsui Chemicals Co., solid content: 27%

2*)molecular mass: 600, epoxy equivalent: 160 mg / eq,

3*)by Nippon Shokubai Co., solid content: 30%

[0087] The sandblasted surface of polyester film having a thickness of 50 μm and a smoothness of 250 seconds was coated with a receiving-layer liquid of the above formula in amount of 0.5 g / m2 after drying, and the receiving-layer liquid was dried to produce a thermal transfer receiver. The surface of the receiving layer had a smoothness of 260 seconds in accordance with JIS P8119. The same thermal transfer medium was used as in Example A-1.

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Abstract

The objects of the present invention are to provide a thermal transfer receiver adapted to form transferred images excellent in solvent resistance and superior in wear resistance, a method for producing the thermal transfer receiver, a method for recording an image, and a recorded image. The objects may be attained by the thermal transfer receiver which comprises a support and a receiving layer disposed on the support, and the receiving layer contains a polyethyleneimine derivative, a thermoplastic resin, and a crosslinker.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to thermal transfer receivers adapted to form transferred images with excellent solvent resistance and superior wear resistance, methods for producing the same, methods for recording images, and recorded images. [0003] 2. Description of the Related Art [0004] Methods for forming images through heating a thermal transfer medium by use of a thermal head and a transferring ink onto a receiving medium are publicly known and are broadly utilized for making labels such as nameplates. When such labels are utilized under circumstances containing organic solvents such as methylethylketone (hereinafter referring sometimes as “MEK”), the images transferred on the labels should be free from erasing under the effect of solvents. [0005] In Japanese Patent Application Laid-Open (JP-A) No. 04-115995, JP-A No. 05-286227, JP-A No. 08-43994, and JP-A No. 08-58250, receivers are disclosed that contain ethy...

Claims

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Application Information

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IPC IPC(8): B41M5/40
CPCB41M5/5254B41M2205/32
Inventor HIROISHI, KATSUNORIMIYAJIMA, SHIGERU
Owner RICOH KK
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